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- W2000279871 abstract "Electron ionization-induced fragmentations of 3-cyclopropanospiro and 3-cyclobutanospiro derivatives of selected benzo- and pyridosultams were studied and compared with the thermal decomposition of these compounds. 3-Cyclopropanospirobenzosultams and the corresponding pyridosultams were found to be thermally stable up to 400 °C. At higher temperatures they eliminate an SO2 molecule yielding several dimethylindole derivatives together with other isomeric compounds. Loss of SO2 is also the main fragmentation process of the molecular ions of these compounds with the exception of the 4-NO2 derivative, for which elimination of CH2O is observed. 3-Cyclobutanospirobenzosultams and -pyridosultams eliminate SO2 on heating above 200 °C, yielding the corresponding 2-aryl-1,3-butadienes. Under EI conditions expulsion of SO2 from the molecular ions is also observed. However, elimination of C2H4 is the dominant process except for the 5-OCH3 derivative. Copyright © 2001 John Wiley & Sons, Ltd." @default.
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- W2000279871 date "2001-01-01" @default.
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- W2000279871 title "Electron ionization-induced fragmentation of 3-cyclopropanospiro and 3-cyclobutanospiro derivatives of Benzo- and pyridosultams" @default.
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- W2000279871 doi "https://doi.org/10.1002/jms.149" @default.
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